/*
 * Copyright 2017 Huawei Technologies Co., Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.servicecomb.springboot.starter.configuration;

import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;

import org.apache.commons.configuration.AbstractConfiguration;
import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.EnvironmentConfiguration;
import org.apache.commons.configuration.SystemConfiguration;
import org.springframework.boot.actuate.endpoint.AbstractEndpoint;

import com.netflix.config.ConcurrentCompositeConfiguration;
import com.netflix.config.ConfigurationManager;

/**
 *
 */
public class CseEndpoint extends AbstractEndpoint<Map<String, Object>> {

    public CseEndpoint() {
        super("archaius");
    }

    @Override
    public Map<String, Object> invoke() {
        Map<String, Object> map = new LinkedHashMap<String, Object>();
        AbstractConfiguration config = ConfigurationManager.getConfigInstance();
        if (config instanceof ConcurrentCompositeConfiguration) {
            ConcurrentCompositeConfiguration composite = (ConcurrentCompositeConfiguration) config;
            for (Configuration item : composite.getConfigurations()) {
                append(map, item);
            }
        } else {
            append(map, config);
        }
        return map;
    }

    private void append(Map<String, Object> map, Configuration config) {
        if (config instanceof ConfigurableEnvironmentConfiguration) {
            return;
        }
        if (config instanceof SystemConfiguration) {
            return;
        }
        if (config instanceof EnvironmentConfiguration) {
            return;
        }
        for (Iterator<String> iter = config.getKeys(); iter.hasNext();) {
            String key = iter.next();
            map.put(key, config.getProperty(key));
        }
    }

}
